Multi-source genesis of continental carbonate-rich fine-grained sedimentary rocks and hydrocarbon sweet spots

JIANG Zaixing,KONG Xiangxin,YANG Yepeng,ZHANG Jianguo,ZHANG Yuanfu,WANG Li,YUAN Xiaodong

Fig. 3. Carbonate-rich fine-grained rocks formed by physical processes. (a) Well ST3, 3 817.90 m, the Es3L of Shulu Sag, laminated carbonate siltstone; (b) Well ST3, 3 797.77 m, the Es3L of Shulu Sag, laminated carbonate siltstone with graded bedding and lenticular structure; (c) Well ST3, 3 809.50-3 809.80 m, the Es3L of Shulu Sag, laminated carbonate mudstone; (d) Well ST3, 3676.60 m, the Es3L of Shulu Sag, laminated carbonate mudstone; (e) Well ST3, 3 897.30-3 897.60 m, the Es3L of Shulu Sag, massive laminated carbonate mudstone; (f) Well ST3, 3 997.31 m, the Es3L of Shulu Sag, massive laminated carbonate mudstone.